<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    {% block title %}
    	<title>模板继承</title>
    {% endblock %}

</head>
<body>
<p>head</p>
<hr>
{% block body_one %}
    <div>中间内容</div>
{% endblock %}
<hr>
<p>尾巴</p>
</body>
</html>